Combined door knob and bell.



Patented Feb. 19, lam.

D. J. FLYNN.

COMBINED DOOR KNGB AND BELL.

(Application filed June 29, 19003 (No Model.)

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DENNIS J. FLYNN, OF EAST CAMBRIDGE, MASSACHUSETTS, ASSIGNOR OFTWO-THIRDS TO JOHN S. THOMPSON, OF SAME PLACE, AND THOMAS A. HUGHES, OFSOMERVILLE, MASSACHUSETTS.

COMBINED DOOR KNOB AND BELL.

SPECIFICATION forming part of Letters Patent No. 668,173, dated February19, 1901.

Application filed \Tune 29, 1900. Serial No. 22,064. (No model.)

T0 at whom it may concern.-

Be it known that I, DENNIS J. FLYNN, a citizen of the United States,residing at East Cambridge, in the county of Middlesex and State ofMassachusetts, have inventednew and useful Improvements in a CombinedDoor Knob and Bell, of which the following is a specification.

This invention relates to new and useful improvements in combined doorknobs and bells; and its primary object is to provide a device of thischaracter which shall be simple of construction and the bell of whichwill be sounded continuously during the revolution of the knob. Thisdevice is particularly adapted for use upon the inside of doors, and isespecially adapted for use as a burglaralarm.

The invention consists in providing a semispherical knob, which issecured at one end of the spindle of the lock. Mounted upon the flatsurface of this knob is a bell of similar form, within which is secureda bracket, pivotally mounted upon which is a knocker. This knocker maybe of any desired construction and is connected to a rod which extendsthrough the knob of the spindle and the end of which bears upon a cam,which is secured to the door and which encircles the spindle. The stemis held normally in contact with the cam and is adapted to bereciprocated thereby when traveling thereover. This reciprocation of therod serves to throw the knocker back and forth into contact with thebell and will obviously cause the same to sound.

The invention also consists in certain features of construction andcombination of parts, which will be hereinafter more fully described andclaimed, and illustrated in the accompanying drawings, showing thepreferred form of my invention, and in which Figure 1 is a bottom planview of the device. Fig. 2 is a central vertical longitudinal Fig. 3 isa section on the line 3 3 of section. Fig. 1.

Referring to the figures of the drawings by numerals of reference, 1 isa spindle, upon the end of which is secured the recessed end 2 of Thisknob may be a semispherical knob 3.

secured to the spindle in any desired manner. Secured to the center ofthe flat face of the knob is a bolt 4, upon the outer end of which ismounted a bell 5 of desired form. This bell is provided upon its innersurface with a rib or projection 6, which is adapted to be contacted bythe knocker when the device is in operation. A bracket 7 extends fromthe bolt 4, and pivoted thereto is a lever 8, the outer end of whichengages a ring 9, which is secured thereto in any desired manner andwhich forms the knocker of the bell. This ring is, as shown, looselymounted upon the end of the lever to permit longitudinal or lateralmovement thereof. The inner end. of the lever 8 lies within the path ofpins 10, which project from the side of the rod 11, which is slidablymounted within the knob 3. This rod preferably passes through a bracket12, against which bears a coil-spring 13, which encircles the rod andabuts at its opposite end upon the outwardly-turned end 14 of the rod.This spring serves to normally hold said end into contact with the edgeof a cam 15, which encircles the spindle, as shown in the drawings, andis secured to the door in any desired manner. A recess 15 is formedwithin the under surface of the rod 11, and this is adapted to receivethe end of a curved strip 16, which is pivoted to the knob 3 at a pointabove the recessed portion 2 thereof. This strip normally contacts withthe rod when the same is in operation and is adapted to engage therecess when the end 14 of the rod is removed from the path of the cam,thus permitting the said knob to be turned. without sounding the alarm.

Brackets 17 extend out from the bolt i and are connected by means ofsprings 18 to opposite sides of the lever 8. These springs are of equalstrength and hold the knocker 9 normally in the position shown in Fig.2.

When the knob is turned from the outside, the uneven surface of the cam15 will obviously throw the rod 11 back and forth within the knob,causing the pins 10 to throw the knocker away from the projection 6.When said pin escapes the lever,the knocker will be thrown into contactwith the rib and obbut I do not wish to be understood as limit ingmyself thereto, as I am aware that changes in the form, proportion, andthe minor details of construction may be resorted to without departingfrom the spirit or sacrificing any of the advantages thereof, and Itherefore reserve to myself the right to make such changes as fairlyfall within the scope of my invention.

Having thus described the invention, what is claimed, and desired to besecured by Letters Patent, is.

1. The combination with a spindle having a knob secured thereto; of acam inclosing the spindle, a bell secured to the knob, a lever pivotedtherein, a knocker upon the lever, a rod slidably mounted within theknob and normally contacting with the cam, and means for operatingthelever from the rod.

2. The combination with a spindle having a knob secured thereto; of acam inclosing the spindle, a bell secured to the knob, a lever pivotedtherein, a knocker thereon, a rod slidably mounted within the knob andnormally contacting with the cam, and a pin projecting from the rod andadapted to contact with one end of the lever.

3. The combination with a spindle having a knob secured thereto; of acam encircling the spindle, a bell secured to the knob, a projectiontherein, a lever pivoted within the bell, a knocker loosely monnted uponone end of the lever, means for holding said knocker normally inalinement with the end of the projection, a rod slidably mounted withinthe knob and normally contacting with the cam, and a pin upon the rodadapted to contact with and release the lever.

4c. The combination with a spindle having a knob secured thereto; of acam encircling the spindle, a bell secured to the knob, a projectionupon the inner surface of the bell, a bracket mounted within the bell, alever pivoted thereto, aknocker loosely mounted upon the end of thelever, springs for holding said knocker normally in alinement with theend of the projection, a rod slidably mounted within the knob, a springfor holding said rod normally in contact with the cam, and pins upon therod within the path of the end of the lever.

5. The combination with a spindle having a knob secured thereto; of acam encircling the spindle, a bell secured to the knob, a lever pivotedwithin the bell, a knocker loosely mounted thereon, a rod slidablymounted within the knob, means for holding the rod normally in contactwith the cam, pins upon the rod in the path of the end of the lever, anda strip pivoted to the knob and adapted to engage a recess within therod.

In testimony whereof I affix my signature in presence of two witnesses.

DENNIS J. FLYN N. Witnesses:

J OHN H. GLEAsoN, JAMEs T. BARRETT.

